Sodium imaging has a great potential for basic research and clinical MRI, but its applications are limited due to poor SNR achievable in typical in vivo scanning times. Image acquisition times can be substantially extended if involuntarily subject motion is compensated for, e.g. by using an external optical motion tracking system. In this proof-of-concept study we demonstrate 1mm isotropic 23Na MRI with the achieved image quality sufficient for the anatomical orientation based on the native sodium images. The used ultra-short echo time 3D imaging sequence was implemented in Pulseq, an open-source platform-independent development environment.